I wiggled it, it wasn't too bad :-)

It's an omni wheel with little wheels all around it

All the scrap plastic is taken by Handy Dan's 3D prints and recycled. The spools go back to 3DFuel for reuse.

The motors top out at 60 revs/second, and there still needs to be enough overhead to balance!

Yes just friction and the bike (and me) on top. Mostly.

I like the idea, but I could only get them in red!